The game was brought to a halt inside the final ten minutes after Clarke required medical assistance on the Leeds bench.

Ambulance staff took him to James Cook University Hospital for further checks, with the player discharged late on Saturday evening and spent the night under the supervision of the Leeds medical staff.

Leeds chief executive Angus Kinnear placed on record his thanks to the Boro medical staff for their assistance and added Clarke’s recovering well.

“Jack has had messages from football fans from every club you can imagine and we all really appreciate it,” Kinnear said in a statement on the club’s website.

“He will undergo some more tests this week and everything is looking well, but he won’t train for the rest of the week.

“In the meantime we would like to thank everyone who has sent well wishes and once again thank Middlesbrough Football Club for all they did for Jack.”

Clarke’s agent and former Leeds defender Ian Harte was also quick to praise the Boro medical team and the staff at James Cook.

Everyone at Middlesbrough Football Club wishes Jack a speedy recovery.